<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avater_box">
        <img src="../assets/logo.jpg" alt="">
      </div>
      <!-- 登录区域表单 -->
      <el-form :model="loginForm" ref="loginFormRef" :rules="loginFormRules" label-width="0px" class="login_form">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>

    </div>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        loginForm: {
          username: "",
          password: ""
        },
        // 这是表单的验证规则对象
        loginFormRules: {
          // 验证用户名是否合法
          username: [{
              required: true,
              message: '请输入登录名称',
              trigger: 'blur'
            },
            {
              min: 3,
              max: 10,
              message: '长度在 3 到 10 个字符',
              trigger: 'blur'
            }
          ],
          // 验证密码是否合法
          password: [{
              required: true,
              message: '请输入登录密码',
              trigger: 'blur'
            },
            {
              min: 6,
              max: 15,
              message: '长度在 6 到 15 个字符',
              trigger: 'blur'
            }
          ]
        }
      };
    },
    methods: {
      resetLoginForm() {
        // console.log(this)
        this.$refs.loginFormRef.resetFields();
      },
      login() {
        this.$refs.loginFormRef.validate(async valid => {
          if (!valid) return;
          const {
            data: res
          } = await this.$http.post('login', this.loginForm)
          if (res.meta.status !== 200) return this.$message.error('登录失败')
          this.$message.success("登录成功");
          // 1.将登录成功之后的token,保存到客户端的sessionStorage中
          //   1.1项目中除了登录之外的其他API接口,必须在登录之后才能访问
          //   1.2token只应在当前网站打开期间生效,所以将token保存在sessionStorage中
          console.log(res)
          window.sessionStorage.setItem('token', res.data.token);
          // 2.用过编程式导航跳转到后台页面,路由地址是 /home
          this.$router.push("/home");
        })
      }
    }

  }
</script>

<style lang="less" scoped>
  .login_container {
    background-color: #2b4b6b;
    height: 100%;
  }

  .login_box {
    width: 28.125rem;
    height: 18.75rem;
    background-color: #fff;
    border-radius: 0.1875rem;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    .avater_box {
      height: 8.125rem;
      width: 8.125rem;
      border: 1px solid #eee;
      border-radius: 50%;
      padding: 0.625rem;
      box-shadow: 0 0 0.625rem #ddd;
      position: absolute;
      left: 50%;
      transform: translate(-50%, -50%);
      background-color: #fff;

      img {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }
  }

  .login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 1.25rem;
    box-sizing: border-box;
  }

  .btns {
    display: flex;
    justify-content: flex-end;
  }
</style>
